Dwarf Pinus (tall) are gorgeous in pots. This is pinus sylvestris ’watereri’ and pinus mugo ’benjamin’, both hardy to zone 5. Pines prefer to be on their own in sunny spot. They are not picky with soil but make sure the pot has good drainage, they don’t like wet soil at all. If the site is too shady or wet they can go brown and drop needles or worst case, they die. I usually keep them in pots for a few years and them plant them in the garden.